Alpaca - Everybody is different and you know your own children and can probably predict their reactions better than anyone, but if you would like your eldest to see some of the information about OC, why not select something not too long that you want him to see, print it out . . maybe even hilite some things and then leave it "accidentally" where he just might see it next time he's at your house. It might catch his eye and if he really cannot bear to look at it, he will put it down. Or he might find it very helpful. That way it's his choice. If you are busy elsewhere it might be easier for him to take a look. Just a thought. It is a difficult situation and maybe you could use another "stalwart" person in your corner.